Dr.-Ing. N.K. Gupta Technical Consultants

Flour, Rice and Grain Milling Engineering Experts
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Rotor Weigher

Continuous weighing of poor flowing bulk solids

Overview:

  • Sealed dust-tight and maintenance-free system
  • Low installation height, easy assembly
  • Largely insensitive to vibrations
  • Direct mass flow measurement with high accuracy
  • Patented and proven measuring system

Application:

The Rotor Weigher RC is suited for the following applications:

  • Continuous weighing of bulk flow for implant control purpose and calculation of extraction
  • Frequency controlled dosage for production of blends or additives

Function:

A vertically aligned rotor is located inside the Rotor Weigher. It is driven at constant speed. The product is fed to the center of the rotor and accelerated to approx. 9 m/s. The occurring Coriolis force is gathered by a torsion spring and captured by a flux induction sensor. The system is completely proportional to the mass flow measurement. Material-specific characteristics such as flow characteristics or friction are not included in the measurement as errors.

Applied Products:

A large number of poor flowing products can be measured, e.g. flour, powder and bran.

Construction:

The Rotor Weigher consists of housing, motor, gear transmission, driving axle, rotor plate and measurement instrumentation. The housing is dust-tight. The housing is made of stainless steel, the inlet is round.

Sizes:

The following sizes are available:

Integration:

Inlet and outlet are supplied with flare tube ends. Product should be fed in straight direction.
Air flowing through the weigher due to pressure differences must be prevented. If necessary
a bypass pipe for pressure compensation must be installed.

Accuracy:

The measuring tolerance lies at +/- 0,5*, depending on feed design, product homogeneity
and throughput.

Evaluation Electronics:

External electronic type FE128
Available for panel mounting (24 V DC) or inside wall housing (230 V AC), can be installed independent from the dosing unit, connection of 1 weighing unit, with LCD-display and keypad, display of capacity and total weight, preselection function, output if kg-pulses and analogue output of capacity (0-10 V), graphic registration over 48h, RS232-485-interface.